Revert changes to a test so it works with nqp, rather than nqpq.

Author: jnthn

t/nqp/50-regex.t

@@ -2,16 +2,16 @@
 
 plan(7);
 
-ok(NQPCursor.parse('a', :rule(/<alpha>/), :p(0)),
+ok(Regex::Cursor.parse('a', :rule(/<alpha>/), :p(0)),
         'Can parse "a" with <alpha> and :p(0)');
 
-ok(!NQPCursor.parse('a', :rule(/<alpha>/), :p(1)),
+ok(!Regex::Cursor.parse('a', :rule(/<alpha>/), :p(1)),
         'Can parse "a" with <alpha> :p(off-range)');
 
-ok(!NQPCursor.parse('a', :rule(/<alpha>/), :c(1)),
+ok(!Regex::Cursor.parse('a', :rule(/<alpha>/), :c(1)),
         'Can parse "a" with <alpha> :c(off-range)');
 
-ok(!NQPCursor.parse('a', :rule(/<alpha>/), :p(5)),
+ok(!Regex::Cursor.parse('a', :rule(/<alpha>/), :p(5)),
         'Can parse "a" with <alpha> :p(far-off-range)');
 
 ok(?('ABC' ~~ /:i abc/), ':i works with literals');